↑ 1.01.11.2Sega has never released a total sales figure for the Sega Genesis. However, there is a detailed history of Sega's first party North American sales through 1998 totaling over 20.998 million, a number confirmed by the New York Times' statement "some 20 million 16-bit Genesis consoles in the United States alone" in 1998;[2] total North American sales had reached over 22.144 million by 2001.

↑ 2.02.1[Majesco]] sold between 1 and 2 million units of their North American only Sega Genesis 3 by the end of 1998.[12] 2.5 million units were sold by the time of its discontinuation[13] in 1999.

↑ 3.03.1Tec Toy has sold over 3 million units of their own Mega Drives in Brazil (as of July 30th, 2012).[14] However, it is unknown if Tec Toy's pre 1995 sales are included in the initial 29 million or not. The Mega Drive is still produced and sold by Tec Toy to this day.

↑Starting with Microsoft's fiscal quarter ending June 2014 (Q4), the company stopped divulging individual platform sales in their fiscal reports.[24] Microsoft CEO Satya Nadella unveiled at a December 3, 2014 shareholder presentation that 10 million units were sold.[25] Ars Technica estimated it to have outsold the Wii U starting in late 2014, continues to outpace it,[26] and reached approximately 19 million worldwide by early January 2016. Microsoft have not confirmed these Xbox One sales figures.[27]

↑Microsoft Annual Meeting of Shareholders. Microsoft (December 3, 2014). Retrieved on January 31, 2015. “Finally, our gaming business is thriving with the Xbox One hitting 10 million units sold. I am thrilled to welcome Mojang and Minecraft community to Microsoft.”

↑Sheff, David; Eddy, Andy (1999), Game Over: How Nintendo Conquered the World, GamePress, p. 27, ISBN978-0-9669617-0-6, "Nintendo entered the home market in Japan with the dramatic unveiling of Color TV Game 6, which played six versions of light tennis. It was followed by a more powerful sequel, Color TV Game 15. A million units of each were sold. The engineering team also came up with systems that played a more complex game, called "Blockbuster," as well as a racing game. Half a million units of these were sold."